/**
 * Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information regarding copyright ownership. Apereo
 * licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use
 * this file except in compliance with the License. You may obtain a copy of the License at the
 * following location:
 *
 * <p>http://www.apache.org/licenses/LICENSE-2.0
 *
 * <p>Unless required by applicable law or agreed to in writing, software distributed under the
 * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apereo.portal.portlet.container.services;

import java.util.ArrayList;
import java.util.List;
import javax.portlet.PortletURLGenerationListener;
import org.apache.pluto.container.PortletURLListenerService;
import org.apache.pluto.container.om.portlet.Listener;
import org.apache.pluto.container.om.portlet.PortletApplicationDefinition;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;

/** */
@Service("portletURLListenerService")
public class LocalPortletURLListenerServiceImpl implements PortletURLListenerService {

    protected final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Override
    public List<PortletURLGenerationListener> getPortletURLGenerationListeners(
            PortletApplicationDefinition app) {
        List<PortletURLGenerationListener> listeners =
                new ArrayList<PortletURLGenerationListener>();
        // this list is needed for the classnames
        List<? extends Listener> portletURLFilterList = app.getListeners();
        // Iterate over the classnames and for each entry in the list the filter..URL is called.
        if (portletURLFilterList != null) {
            for (Listener listener : portletURLFilterList) {
                ClassLoader loader = Thread.currentThread().getContextClassLoader();
                Class<? extends Object> clazz;
                try {
                    clazz = loader.loadClass(listener.getListenerClass());
                    if (clazz != null) {
                        listeners.add((PortletURLGenerationListener) clazz.newInstance());
                    }
                } catch (ClassNotFoundException e) {
                    logger.error("class not found for " + listener.getListenerClass(), e);
                } catch (InstantiationException e) {
                    logger.error("instantiation failed for " + listener.getListenerClass(), e);
                } catch (IllegalAccessException e) {
                    logger.error("IllegalAccessException for " + listener.getListenerClass(), e);
                }
            }
        }
        return listeners;
    }
}
